package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.support.geo.Feature;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    private Orders orders;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //查询地址是否为空
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if (addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询购物车是否为空
        Long currentId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(currentId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList==null||shoppingCartList.size()==0){
              throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //处理完异常
        //订单表中插入一条数据
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setAddress(String.valueOf(addressBook));
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(currentId);
        this.orders=orders;
        orderMapper.insert(orders);
        //向订单明细表插入n条数据
       List<OrderDetail> orderDetails=new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail=new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//当前订单明细关联
            orderDetails.add(orderDetail);
        }
        //批量用mapper插入n条数据
        orderDetailMapper.insertBatch(orderDetails);

        //清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(currentId);


        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder().
                id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);
        String outTradeNo = ordersPaymentDTO.getOrderNumber();
//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        Integer OrderPaidStatus = Orders.PAID;//支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单
        LocalDateTime check_out_time = LocalDateTime.now();//更新支付时间
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orders.getUserId());
        Map map=new HashMap();
        map.put("type",1);//1代表来单提醒
        map.put("orderId",orders.getId());
        map.put("content:","订单号:"+outTradeNo);
        String jsonString = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
        return vo;


    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);


    }

    /**
     * 历史订单查询
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQueryUser(int page, int pageSize, Integer status) {
        PageHelper.startPage(page,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO=new OrdersPageQueryDTO();
        Long userId = BaseContext.getCurrentId();
        ordersPageQueryDTO.setUserId(userId);
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> ordersPage=orderMapper.pageQuery(ordersPageQueryDTO);
        //订单详情
        List<OrderVO> list=new ArrayList<>();
//        for (list:
//             ) {
//
//        }
        if (ordersPage!=null &&ordersPage.getTotal()>0){
            for (Orders orders : ordersPage) {
                Long orderId = orders.getId();
                List<OrderDetail> orderDetails=orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }

        return new PageResult(ordersPage.getTotal(),list);
    }


    public OrderVO details(Long id) {
//        OrderDetail orderDetail=new OrderDetail();
//        Long userId = BaseContext.getCurrentId();
//        orderDetail.setOrderId(userId);
//        orderDetail.setId(id);
        Orders orders=orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }


    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB=orderMapper.getById(id);
        // 校验订单是否存在
        if (ordersDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }


    public void repetition(Long id) {
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        shoppingCartMapper.insertBatch(shoppingCartList);
    }


    public PageResult search(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(ordersPage);


        return new PageResult(ordersPage.getTotal(),orderVOList);
    }


    private List<OrderVO> getOrderVOList(Page<Orders> ordersPage) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = ordersPage.getResult();
        if (!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders: ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
            return orderVOList;
    }
    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList=orderDetailList.stream().map(x->{
            String orderDish=x.getNumber()+"*"+x.getNumber()+";";
            return orderDish;
        }).collect(Collectors.toList());
        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("",orderDishList);
    }
    
    public OrderStatisticsVO statistics() {
        Integer confirmed=orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer deliveryInProgress=orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        Integer toBeConfirmed=orderMapper.countStatus(Orders.TO_BE_CONFIRMED);

        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        return orderStatisticsVO;
    }


    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
            Orders orders=new Orders();
            orders.setId(ordersConfirmDTO.getId());
            orders.setStatus(Orders.CONFIRMED);
            orderMapper.update(orders);
    }


    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
         //根据id查询订单
        Orders ordersDB=orderMapper.getById(ordersRejectionDTO.getId());
        if (ordersDB==null||ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Integer payStatus = ordersDB.getPayStatus();

        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     * @return
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders ordersDB=orderMapper.getById(ordersCancelDTO.getId());
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     * @return
     */
    public void deliver(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        Orders orders = new Orders();
        if (ordersDB!=null ||ordersDB.getStatus().equals(Orders.CONFIRMED)){
            orders.setId(ordersDB.getId());
            orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
            orders.setCancelTime(LocalDateTime.now());
        }
        orderMapper.update(orders);

    }
    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }


    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Map map=new HashMap<>();
        map.put("type",1);//1代表来单提醒
        map.put("orderId",orders.getId());
        map.put("content:","订单号:"+ordersDB.getId());
        String jsonString = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);


    }

}
